#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001],urm[100001],l[100001];
int main()
{
    int n,p,max=0,i,j;
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    l[n]=1;
    urm[n]=0;
    for(i=n-1;i>0;--i)
    {
        max=0;
        p=0;
        for(j=i+1;j<=n;++j)
            if(v[j]>v[i] && l[j]>max)
            {
                max=l[j];
                p=j;
            }
        l[i]=max+1;
        urm[i]=p;
    }
    max=l[1];
    p=1;
    for(i=2;i<=n;i++)
        if(l[i]>max)
        {
            max=l[i];
            p=i;
        }
    g<<max<<"\n";
    while(p>0)
    {
        g<<v[p]<<" ";
        p=urm[p];
    }
    f.close();
    g.close();
    return 0;
}